Would This Work? - Page 2

 

Ken Maltby wrote:


Vibration can cause compression. Piezo devices have been used in audio
transducers for many many decades.

Graham

 

  True, with a design that creates that effect, like a record needle's
movement against the piezo device, as the other end of the needle
follows the groove of a record.  Or the piezoelectro device(s) that
formed the active part of some telephone handsets.

  For power generation, all the experiments I've read about use
some form of direct compression.  The most interesting used a
number of pyramids of piezo devices ganged together.  (Sorta
like the way peltiers are formed into pyramids to reach lower
temp.)  Alternating pyramids and up side down pyramids form
a layer that is compressed between top and bottom plates.

Luck;
    Ken


 

 

Ken Maltby wrote:


There are additionally some 'piezo transformers'. These are bar shaped (like
one leg of a tuning fork) and one end is excited to make it oscillate at
presumably its natural frequency, whilst power is taken out as a higher
voltage IIRC at the other end. The Japanese seemed to be into this. It's a
niche technology though.


Graham